Abstract
We investigated the spatiotemporal evolution of single cycle terahertz pulses transmitted through a split ring resonator array including a void. Using a large-field-of- view terahertz microscope, we revealed the confinement and enhancement of the defect mode.
Highlights
Metamaterials have attracted a lot of attention due to their unique ability to be engineered to have the desired electromagnetic properties at optical wavelengths [1]
We investigated the spatiotemporal evolution of single cycle terahertz pulses transmitted through a split ring resonator array including a void
In split ring resonators (SRR) organized in a periodic fashion, the coupling between elements leads the material to behave like a photonic crystal with electromagnetic modes propagating in the array, i.g., topic related to magnetoinductive wave [3]
Summary
Metamaterials have attracted a lot of attention due to their unique ability to be engineered to have the desired electromagnetic properties at optical wavelengths [1]. These artificial materials have exotic properties such as negative magnetic permeability, perfect lensing, and cloaking [1]. We investigated the effect of defects inside an SRR array by visualizing the electromagnetic field distributions at terahertz (THz) frequencies. The field was enhanced at the resonance frequency inside the space left by one missing element To our knowledge, this is the first electric field visualization of a defect mode in the THz region (including the defect mode in photonic crystals)
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